Railway tunnel entrance and sound absorption device in tunnel and method for mounting ceramic sound absorbing plate

Abstract

The invention provides a method for mounting a sound-absorbing device at the tunnel front, a sound-absorbing device in the tunnel and a plurality of ceramic sound-absorbing plates. In order to reduce the noise at the tunnel front, a plurality of ceramic sound-absorbing plates (1) are fixed on an existing buffering part (9) in parallel; a back blocking plate (13) is arranged between the ceramic sound-absorbing plate (1) and a micro air pressure wave moderating part (11) of the existing buffering part (9) for forming a path, in which the micro air pressure wave passes through in order to form a back air layer to improve the sound absorption effect; the micro air pressure wave moderating part (11) is used for moderating the micro air pressure wave; in addition, in order to reduce the noise inside the railway tunnel, a chemical fixer (110) and a bolt (111) are used on an inner wall (109) of the tunnel for fixing a rail-shaped setting part (113); and a plurality of ceramic sound-absorbing plates (101) are fixed on the setting part (113) in parallel through a plurality of bolts (114).

Description

technical field [0001] The present invention relates to a sound-absorbing device for absorbing noise at a railway tunnel entrance and a method for installing a ceramic sound-absorbing plate on an existing buffer portion, and is useful for preventing noise at a Shinkansen (Japanese high-speed railway) tunnel entrance, for example. [0002] In addition, the present invention relates to a sound-absorbing device for absorbing noise in a railway tunnel and a method for installing a ceramic sound-absorbing panel on an inner wall of a railway tunnel, and is particularly useful for preventing noise in a Shinkansen tunnel. Background technique [0003] The noise generated when the train passes through the railway tunnel is reflected in disorder in the tunnel and spread out from the tunnel entrance. Therefore, it is required to reduce the noise at the tunnel entrance and the tunnel, and such a request is even stronger for the Shinkansen. [0004] Examples of patent documents related t...

AI Technical Summary

Problems solved by technology

[0010] (1) The sound-absorbing material of the fiber series has the disadvantage of being scattered by the wind pressure and vibration caused by the train, or the sound-absorbing effect is easily significantly deteriorated by moisture

In fact, there are no examples of installing fiber-based sound-absorbing materials in tunnel entrances such as Shinkansen and railway tunnels

[0011] (2) In addition, when using fiber-based sound-absorbing materials, in order to prevent the above-mentioned scattering and deterioration, it is considered to adopt a sound-absorbing structure in which a fiber-based sound-absorbing material is placed in a metal shell and a part of the front is opened, but because the opening is not enough Large, so the sound absorption effect is limited

[0017] (3) In this way, chemical fixers cannot be arbitrarily set on the inner wall of the railway tunnel, so it is not possible to set all of the multiple ceramic sound-absorbing panels in ideal positions

[0018] (4) When installing ceramic sound-absorbing panels on the inner wall of the tunnel, it is considered to use a total of six chemical material fixers on the four corners and two points inside each ceramic sound-absorbing panel 101. However, in order to install multiple ceramic sound-absorbing panels , the total number of chemical material holders used is large, and this alone will cause poor operability and time-consuming

However, the buffer is a structure with a member (usually a corrugated plate: corrugated plate) that buffers the micro-pressure wave, and only moderates the micro-pressure wave without sound absorption.

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